Unswayed by the latest offer from Dutch sports car maker Spyker Cars, Detroit-based GM is preparing to mothball Saab for good, The Economic Times has reported, citing a news report published Wednesday in Sweden.

After announcing Friday that it would shutter Swedish car maker Saab, GM has reportedly received several inquiries from potential buyers. One is from previously rejected Saab suitor Spyker Cars, which has submitted a revised bid that expires at 5 p.m. Monday.